217396108069992 has 64 divisors (see below), whose sum is σ = 603881643657600. Its totient is φ = 72464941474560.

The previous prime is 217396108069967. The next prime is 217396108070033. The reversal of 217396108069992 is 299960801693712.

217396108069992 is a `hidden beast` number, since 2 + 1 + 7 + 396 + 10 + 80 + 69 + 9 + 92 = 666.

It is a super-2 number, since 2×217396108069992² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 217396108069992.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34803733 + ... + 40572059.

It is an arithmetic number, because the mean of its divisors is an integer number (9435650682150).

Almost surely, 2^{217396108069992} is an apocalyptic number.

It is an amenable number.

217396108069992 is an abundant number, since it is smaller than the sum of its proper divisors (386485535587608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217396108069992 is a wasteful number, since it uses less digits than its factorization.

217396108069992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942823 (or 5942813 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 72.

The spelling of 217396108069992 in words is "two hundred seventeen trillion, three hundred ninety-six billion, one hundred eight million, sixty-nine thousand, nine hundred ninety-two".